Light bracket



Feb. 23 1926. 1,573,799

H. J. BOSWORTH LIGHT BRACKET F1ed Dec 29 1924 Patented Feb. Z3, 1926.

Unirse stares PATENT HARRY J". BOSWORTH, 'VOF CHICAGO, ILLENOS, ASSIGNORTO HARRY J'. BOSWORTH COMPANY, OF CHCAGO, ILLNOIS, A COBPGRATON OFILLINOIS.

LIGHT BRACKET.

Application tiled December 29, 1924. Serial No. 758,517.

To ,all whom t may concern:

Be it known that I, HARRY J. Boswon'rri, a citizen 'of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented al certain new and us'eiul Improvement in LightBrackets, of which the following is a full, clear, conoise, and exactdescription, reference being .had to the accompanying drawino's,-forming a part of this specification.

My invention relates to light brackets and its object is the provisionot' a generally improved, simple and inexpensive take-up means for theconductor of the electric lamp (shownand described in my co-pendingapplication, Serial No. 727,166, tiled July 21, 19211).`

In that device the current supplying conductor for the electric lampextends through the tubular mounting post and moves in and out throughthe bottom of the post in extending and retracting the lightarm,provision being made usually externally of the post for moving theconductor outof the bottom thereof to take-up the slack in retractingthe arm, and such provision at the same time permitting movement of theconductor up into the post in extending the arm. The means of my present.invention is adapted for embodiment withinthe bracket itself,preferably within the extensible and retractable light arm thereof, andit prog vides for taking up the slack of the conductor without movementof same into and out of the bottomV of the mounting post and without theusual external provisions heretofore made for that purpose. It `alsomakes possible an improvement in the means for limiting the extension otthe light arm and vcti-operates with said means to the cud ot a simpleand inexpensive combination havretractable light arm;

Fig. 3 is a transverse section on line SNS o t Fig?,

Fig. 4 is a transverse section on line 1- 4 o1 Fig. 2;

Fig. 5 is a transverse section on line 5--5 of Fig. 2.

Referring to the drawings, the supporting bracket of the fixture `isdesignated at 10 and comprises a tubular post 12,/in which the tubularpost let is rotatably mounted, said post 12 having on each side a pairof integral feet or apertured lugs 12 for attachment to the wall orother support. As more fully disclosed in my aforesaid copendingapplication, the post 1li has clamped thereon, at its upper end, a pairoit' head members 15, and a head 1G, at the adjacent end of the lightarm 17, is mounted between said head members 15 upon a pin or post 18for swinging movement in a vertical plane thereabout. i

The light or lamp carrying arm 17 comprises a pair of telescoping tubes2O and 21` the tube 21 being suitably secured in the tubular projection23 of the mounting head 1.6. Fixedly mounted upon the outer end ot tube20, is a light supporting litting 24 having a downwardly opening mouthin which, and between the sides ot the fitting. 1s pivoted at 25, apendant light support 2G. The particular light shown comprises a lowertranslucent bowl or open topped globe 27' and an upper shade 28. i

The light and light arm may be counterbalanced in any suitable manner,preterably in the manner disclosed in my hereinbefore referred toco-pending application. by means housed in the tubular post 11 andassociated hea-d member 12. In usc, tbc arm 17 has pivotal or swingingmovei'nent in a vertical plane about pivot 1S and the light may be swunginto any position about said pivot. The light may be swung in ahorizontal plane by turning or rotation ol? post 14 in the mountingbracket 10 and tbe 'distance of the light from the support is increasedor decrease-t, and its path ol swinging movement about pivot 18 in avertical plan-e and about post 14 in a horizontal plane, may beadjustedby extension or retraction oi' the telescoping arms 2O and 21. Althoughsuitable means may be provided for locking the tube 20 in any desiredeX- tended or retracted position, this tube is, as before, preferablyheld by friction and the counter-balancing action so that a nut or othermeans need not be loosen-ed or adjusted each time.

The conductors 30, which supply current to the lamp 82, are preferablyot the ilexible type and they are led into the loiver open end otsupporting tube le, up', out., around the pivot 18 in the head membersat the upper end ot said post, out through tubular arms 2O and 21 anddown through the pendant supportQG to the lamp 32, with which they havesuitable electrical connection,` Ls for example, by means of al standardEdisonf or any other preferred type ot socket or connecting member. Onthe outer end of armQl isa terrule 85.

' anchored fixedly in the postvend ot arm 2l, as by means ot' a radialpin 38, is a disc or bloclr 10 which serves the dual function of a stopor abutment for one' end of the coiled or spring take-up portion ot theconductors and carries an axial rod 4t2 tor limitingl the extension otthe arm 2 It is to be understood 'that a complete disc is not necessary,

Y but the particular form ot stop or abutment and rod carrying membermay be varied.

Anchored ixedly in the inner end of the Xtensible arm 20as by meansY ota radial pin :2-, is a second disc or block et which serves the dualfunction of stop or abutment for the opposite end ot the coiled taketi nof the conductor, and a guide for The rod or stein e2 is tif;-

in the block 4:0 and pro- 7och lf-i therealong in the n of the arm 20.The es has a head 46 which, n the block t-t, limits the further functionof a stop arm of the ixture. .Each

'from its periphery, `as indicated at t ann e8, the conductor 30 beingled thro-ugh the notch /l into the space between the blocks and throughthe notch e8 out to the light 32 at the opposite end ot the tixture.Between the blocks Ll() and 14, the conductor 30 is coiled helically at5t), formino` in etiket a spring and thereby a spelt .-up provision initself. Conductor Wires haring suflicient springiness to impart anydesired springaction at this point, may

be emiiloved or additional sirinO Qrovision Y may even Vbe made alongthislengthof the wire. Y I iind that the ordinary flexible conductorsusually employed have considerable springinessfor the'selt take-uppurpose in tended. The conductors illustrated comprise, as showninligures 3 and 5, a pair ot wires or conductors insulated trom eachother and enclosed in a common covering,

standard practise heilig to provide a fabric or silk Wound covering forsuch conductors. It is tobe understood, however, that the particulartype or conductor or conductors employed may be varied as desired. Theconductors may be separately Wound and stranded together and, as alreadypointed out, the usel of special spring conductors and the provision oiadditional spring strips or other means along the coiled portions of theconductors is contemplated.

ln use, as the distance from the light' 32 to the mounting` post isincreased upon ex tending the arm 20, the additional length of:conductor reqired is drawn from the coiled portion 50 ot the conductorWithout the necessity of moving the conductor into and out o't' thebottom of the post 14. As the extensible light arm ot the .fixture isretracted, the slack `in conductor 30 is automatically taken up by thecoiled portion x50` thereoic and the outer land inner ends of theconductor on each side of the coiled portion 570, are i maintainedsubstantially taut at all times and gathering, binding, collecting andinterret'erence With proper movement of the parts oi. the lixture by theconductor is prevented.

The provisions which I have made are adapted for embodiment in theeXtensible arm itself, so 'as to in no Way interfereivith thecounterbalancing means in the tubular mounting post of the ixture and byeliminatingmovement of the conductors into and ji out of the bottom ofthe post 14: and external talreuip provisions, a more compact fixtureand pleasing appearance is secured.

While l have described my invention in connection with the details of aparticular 1:

embodiment, it is to be understood that modifications and changes andother uses than that described are contemplated Within the scope of mypresentinvention.

l claim:

l. In a lightingtixture, a support, an arm mounted on said support,rsaid arm comprising a pair of telescoping tubes, a block member mountedin one tube, a block member mounted in the other tube, a light on saidarm, and a conductor for said light, said conductor extending throughsaid tubes `and coiled helically between said block .members and meansmounted upon one ot said block members and cooperable with the oth erblock member tor limiting the extension ot said tubes.

2. ln a lighting tixture, a support, an arm iounted on'said Support,Said arm comprising a pair ot telescoping tubes, ka block member mountedin one tube, a block member mounted in the other tube, a light on saidarm, a conductor tor said light, said concluetcr extending through saidtubes and coiled helically between said block members, and a steinsecured to one oi' said block meinbers and extending longitudinallythrough l@ Sl-dingly through the other, a head on said Stem co-operablewith Suid other block member for limiting the extension of the tubes. ulight on said arm and u conductor for said light, said conductor having"take-up means teusioned in said arm and between said first and secondblock members.

u Witness whereof, I hereunto subscribe my name this 22 day of December,1924.

HARRY J. BOSWORTH.

